//ex9_4.cpp
#ifndef SALES_H__  
#define SALES_H__
//#include <iostream>
namespace SALES
{
    const int   QUARTERS = 4;
    struct Sales
    {
        double sales[QUARTERS];
        double average;
        double max;
        double min;        
    };

    void setSales(Sales &s, const double ar[], int n);
    void setSales(Sales &s);
    void showSales(const Sales &s);
}
#endif